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A platform for research: civil engineering, architecture and urbanism
Preparation method of super-early-strength concrete for first-aid repair
The invention discloses a preparation method of super early strength concrete for emergency repair. The super early strength concrete is prepared from the following raw materials in parts by weight: 520 to 580 parts of rapid hardening cement, 650 to 780 parts of sand, 910 to 1082 parts of broken stone, 5.2 to 5.8 parts of a water reducing agent, 1.04 to 1.16 parts of a retarder and 150 to 180 parts of water. The preparation method comprises the following steps: (1) uniformly mixing fine sand and gravel according to the ratio to obtain an aggregate mixture, then adding a retarder into the aggregate mixture, and uniformly mixing; and (2) adding the quick-hardening cement, the water reducing agent and the water, and uniformly stirring to obtain the super-early-strength concrete. According to the method disclosed by the invention, the gravel aggregate is uniformly stirred with the retarder at first, and the rapid hardening cement is added after moisture in the gravel is ensured to contain the retarder, so that the rapid hardening cement is in full and uniform contact with the retarder, the setting time of the super-early-strength concrete can be accurately controlled, and the standard deviation of the setting time is not greater than 2 mins; and convenience is provided for construction of roads, engineering first-aid repair and the like.
本发明公开了一种抢修用超早强混凝土的制备方法，其所述超早强混凝土由包括以下重量份的原料制成：快硬水泥：520‑580份、砂子：650‑780份、碎石：910‑1082份、减水剂：5.2‑5.8份、缓凝剂：1.04‑1.16份、水：150‑180份；制备方法包括以下步骤：(1)按照配比，将细砂子、碎石混匀，得到骨料混合物，然后向骨料混合物中加入缓凝剂混合均匀；(2)再加入快硬水泥、减水剂和水搅拌均匀，即得超早强混凝土。本发明通过砂石骨料先与缓凝剂搅拌均匀，确保砂石中的水分均含有缓凝剂后再添加快硬水泥，这使得快硬水泥与缓凝剂充分均匀地接触，使得超早强混凝土的凝结时间可以精确控制，凝结时间的标准差不大于2mins，为道路、工程抢修等的施工提供便利。
Preparation method of super-early-strength concrete for first-aid repair
The invention discloses a preparation method of super early strength concrete for emergency repair. The super early strength concrete is prepared from the following raw materials in parts by weight: 520 to 580 parts of rapid hardening cement, 650 to 780 parts of sand, 910 to 1082 parts of broken stone, 5.2 to 5.8 parts of a water reducing agent, 1.04 to 1.16 parts of a retarder and 150 to 180 parts of water. The preparation method comprises the following steps: (1) uniformly mixing fine sand and gravel according to the ratio to obtain an aggregate mixture, then adding a retarder into the aggregate mixture, and uniformly mixing; and (2) adding the quick-hardening cement, the water reducing agent and the water, and uniformly stirring to obtain the super-early-strength concrete. According to the method disclosed by the invention, the gravel aggregate is uniformly stirred with the retarder at first, and the rapid hardening cement is added after moisture in the gravel is ensured to contain the retarder, so that the rapid hardening cement is in full and uniform contact with the retarder, the setting time of the super-early-strength concrete can be accurately controlled, and the standard deviation of the setting time is not greater than 2 mins; and convenience is provided for construction of roads, engineering first-aid repair and the like.
本发明公开了一种抢修用超早强混凝土的制备方法，其所述超早强混凝土由包括以下重量份的原料制成：快硬水泥：520‑580份、砂子：650‑780份、碎石：910‑1082份、减水剂：5.2‑5.8份、缓凝剂：1.04‑1.16份、水：150‑180份；制备方法包括以下步骤：(1)按照配比，将细砂子、碎石混匀，得到骨料混合物，然后向骨料混合物中加入缓凝剂混合均匀；(2)再加入快硬水泥、减水剂和水搅拌均匀，即得超早强混凝土。本发明通过砂石骨料先与缓凝剂搅拌均匀，确保砂石中的水分均含有缓凝剂后再添加快硬水泥，这使得快硬水泥与缓凝剂充分均匀地接触，使得超早强混凝土的凝结时间可以精确控制，凝结时间的标准差不大于2mins，为道路、工程抢修等的施工提供便利。
Preparation method of super-early-strength concrete for first-aid repair
一种抢修用超早强混凝土的制备方法
CAO WEIDA (author) / HUANG JIABAO (author) / SUN YUANSONG (author) / ZHANG WEI (author) / DENG YI (author) / JIANG LIN (author)
2023-09-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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